Pick having detachable points.



No. 355,677, PUBMED JUNE 4, 190'?. A. THOMPSQN,

.PNK HAVING DETGHBLE NTS.

MPLIOATION FILED APB.24,1906,

J wuentoz UNITED s'rnfrns .naar irren,

. PICK HAVING DETACHABLE POENTS- vSpecicatien of Letters Patent.

Patented June 4, 1907.

Application filed April 24, 1906. Serial No. 313,456.

To all whom it may concern,.-

Be it known that I, ALBERT THOMPSON, a citizen of the United States, residing at Newburgh, county of Orange, and State of New York, haveinvented certain new and useful Improvements in Picks Having Detachable Points, of which the following is a specification.

-This invention relates to picks having detachable points..

' The object of my invention is the -rovi sion of a pick having points provide with novel Shanks or tenons, together with -a pick head or holder having novel sockets to receive said Shanks or tenons, and set screws on the head or holder for l'clamping the tenons or Shanks in the sockets in an improved fashion.

Among the advantages gained in the ruse of my pick are the following: strength, lightness, durability, few and simple parts, interchangeability of pick points so that various kinds of points may be used at will, cheapness of manufacture on account of the Aeliminationv oi" much niaohining of the parts, adaptability oi' the holder or head l for .straight boring or drilling of the sockets to receive the shanks or tenons, facility in turn-v ing the Shanks or vtenons of the oints, and adaptability foi' rigid clamping o the oints and 'prevention of accidental detac p ent thereof.

Other objects of the invention will appearhereinafter.

The invention is set forth'fully hereinafter pended claims.

. In the accom anying drawings: Figure 1 and the novel features are recited in the apisa side view o the pick; Fig. 2, a longitudinal section; Fig. 3, a top view; Fig. '4, a bottom view; Fig. 5, a section on line 5 5 of ,Fi'g. 1; and Fig. 6, a bottom plan of the shank of. one of the points. l

The ick head or holder 1 may be of cast metal ashioned with an eye 2 for the handle The sockets Sand 4 are cast with an annular enlarged recess 5 and they are in line with each-other so that they may be finished by `14 and 15.

straight boring or' drilling in one operation 5 from end to end of the pick head or holder 1, said sockets intersecting the eye 2. This manner of positioning the sockets in line with each other and of boring or drilling them greatly cheapens the cost of produd- 5 tion of the tool over picks having detachable points as heretofore known to the lart as expensive machiningis rendered unnecessary. The deep recesses 5 which are located intermediate the ends of the sockets do away l6 with considerable machine work which would otherwise be necessary. t.

On its under side the holder is provided with bosses 6 and 7, through which are threaded set screws 8 and 9 whose tips enter 6 the' sockets through the recesses or chambers 5.

The pick points l() maybe of any desired' form and they are provided with the cylindrical 'Shanks or tenons 11 which are of'a 7 size and length to fit in the respective sockets' 3 and 4, said c lindrical parts being provided with the smaller centrally located annular depressions or grooves 12, which lie opposite the chambers or recesses 5. The shanks or 7 tenons are provided with flats 13, thereby providing shoulders 14 and 15. lThe tips of the set screws Sand@ are adapted to bear upon these :flats intermediate the shoulders By havingk the llats somewhat. 8 longer than` the diameters of the set screws, any slight inaccuracies in positioningr the set screws in any given pick 'holder or head will not aectthe use of any interchangeable pick point in that head or holder. The flats serve, also, to properly locate the shank or tenon when inserting it in its socket so that thispoperation is quickly accomplished.

. Having thus described my invention, what .I-claim as new and deslre to secure by Letters o Patent, is z- '1. In a pick, the combination with a holder l or head having aneye for the handle or helve and cylindrical sockets located in alinement with eachother andopening into the eye 9 aforesaid, of piek points having cylindrical shanks received in said sockets, and means vfor holding the pick points.

'2. In n pick, lm cmnbmltion Wgh a pick sidembly Wider than the dialnet-er olii the Lip point hohlm' 0l' howl. having Gylmdmcal l 0i' the screw. v 1o socket, of :L Set Screw 'tl'xreaded through the i In ts'LimGuf Wheleo hereunto afx my holder or howl, mul 1, pick pon' having a Cyl signature in plcsence of two Witnesses.

5 lmlricfnl umhleaulcal shank leoevived in the i ALBERT T'HMPSGN,

sol-,kut and provided with un arm@ fr grow/'Q E Wimessos:

' having' n, Wint" adapted 31u? engagement by i Cms 'll'ffmRNElg iho Lip o1 th@ scrow, sami@ groove being con" 'y JAMES UULLEN. 

